Unified notification bar between virtual mobile device and physical mobile device

ABSTRACT

One or more embodiments of the invention display alerts provided by applications of a guest environment in a notification bar controlled by a host operating system (OS) in a host environment of a mobile device, wherein the guest environment is running in a virtual machine supported by a hypervisor running within the host environment. A hypervisor-aware service in the virtual machine registers with a guest OS to be notified when applications request presentation of alerts in a notification bar controlled by the guest OS. Upon receipt of a notification by the guest OS of an application requesting presentation of an alert in the notification bar controlled by the guest OS, the hypervisor-aware service forwards the notification to the hypervisor and the hypervisor transmits a corresponding request to a notification management component of the host OS to present the alert on the notification bar controlled by the host OS.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional PatentApplication 61/515,656 filed on Aug. 5, 2011 and entitled “UserInterfaces for Mobile Computing Devices Having Personal and WorkEnvironments,” which is hereby incorporated by reference. Thisapplication is also related to the patent applications entitled“Switching Between Mobile User Interfaces for Personal and WorkEnvironments” Ser. No. 13/566,288, “Displaying Applications of a VirtualMobile Device in a User Interface of a Mobile Device” Ser. No.13/566409, “Lock Screens to Access Work Environments on a PersonalMobile Device” Ser. No. 13/566,734, and “Sharing Work EnvironmentInformation Sources with Personal Environment Applications” Ser. No.13/566,745, all of which are assigned to the assignee of thisapplication and have been filed on the same day as this application.

BACKGROUND

Over the past decade, enterprises have experienced a substantialincrease in the productivity of its workforce when providing them withbusiness mobile devices. In the past, given their high cost, businessmobile devices were mainly allocated to management and focused onproviding employees with email access and cellular phone capabilities.However, recent improvements in the computing power, mobile displaytechnologies and connection speeds of mobile devices, combined with thecontinued decreases in hardware costs, have made powerful mobile devicesavailable even to the general public for personal use. More and moreindividuals personally own powerful mobile devices, such as smartphones,that, in addition to serving as a cellular phone, can be used in many ofthe same ways as a desktop or a laptop, such as accessing emails,browsing documents or the internet, game playing, listening to audio orviewing a video, and personal information management (PIM).

Due to the above trends in mobile devices, enterprises are currentlyexperiencing an “invasion” of personal devices into the workplace. Giventhe sophisticated capabilities of their personal mobile devices,employees no longer desire possessing a separate personal and businessmobile device and continually pressure information technology (IT)departments to support personal devices brought into the workplace. Assuch, IT departments struggle to maintain a proper balance betweenenabling a certain level of access to enterprise data (e.g., such asaccess to email, contacts, documents, and the like) on personal devicesand ensuring adequate security measures to protect corporateintellectual property in such enterprise data. This phenomenon has ledenterprises to investigate the viability of a “Bring Your Own Device”(BYOD) strategy to IT, where a personal mobile device is provisioned byIT departments with the capability of operating as a complete businessmobile device in a secure fashion.

Such a BYOD strategy could significantly decrease IT costs (e.g., byeliminating or reducing the need to purchase and provision hardwaredevices) and provide mobile enterprise access to many more employeesthan was previously possible (e.g., due to cost concerns), therebyachieving greater increases in productivity than before. However,significant challenges arise in providing streamlined user interfaces onthe mobile device that enable users to seamlessly switch from a personalmobile environment to a business mobile environment while stillmaintaining adequate security and data partitioning between the“personal world” and “business world” on the mobile device.

SUMMARY

One or more embodiments of the invention display alerts provided byapplications of a guest environment in a notification bar controlled bya host operating system (OS) in a host environment of a mobile device,wherein the guest environment is running in a virtual machine supportedby a hypervisor running within the host environment. In one method, ahypervisor-aware service running in the virtual machine registers with aguest OS of the virtual machine to be notified by the guest OS whenapplications of the guest environment request the guest OS to presentalerts in a notification bar controlled by the guest OS (e.g., receivedemails, missed telephone calls, etc.). Upon receipt of a notification bythe guest OS of an application requesting presentation of an alert inthe notification bar controlled by the guest OS, the hypervisor-awareservice forwards the notification to the hypervisor and the hypervisortransmits a corresponding request to a notification management componentof the host OS to present the alert on the notification bar controlledby the host OS.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a schematic illustration of a mobile computing deviceaccording to one or more embodiments of the invention.

FIG. 1B is a block diagram that illustrates components of the mobilecomputing device of FIG. 1A.

FIG. 2 illustrates user interfaces for a personal mobile device and awork mobile device, a process for switching between the two, and anotification bar that persists in both user interfaces.

FIG. 3A is a flow diagram that illustrates the process of switching fromthe personal mobile device to the work mobile device.

FIG. 3B is a flow diagram that illustrates the process of switching fromthe work mobile device to the personal mobile device.

FIG. 4 illustrates user interfaces for the personal mobile device andthe work mobile device and another process for switching between thetwo.

FIG. 5A illustrates a unified home screen that includes UI elements ofboth the personal mobile device and the work mobile device.

FIG. 5B illustrates a display of a unified task manager for activeapplications from both the personal mobile device and the work mobiledevice.

FIG. 5C is a flow diagram that illustrates the process of presenting UIelements from the work mobile device in the unified home screen of FIG.5A and launching applications in response to selections of such UIelements.

FIG. 5D is a flow diagram that illustrates the process of presentingactive applications from the work mobile device in the display of theunified task manager of FIG. 5B.

FIG. 6A illustrates a user interface for the personal mobile device thatincludes a notification bar having a work icon for switching the user tothe work mobile device.

FIG. 6B illustrates a user interface for the work mobile device thatincludes a notification bar having a personal icon for switching theuser to the personal mobile device.

FIGS. 7A and 7B are schematic illustrations of a mobile computing devicethat is configured in different ways to notify a user of the computingdevice the user is working in.

FIGS. 8A, 8B, and 8C each illustrate a lock screen of a mobile computingdevice and a different process for entering either the personal mobiledevice or the work mobile device from the pin lock screen.

FIG. 9 is a flow diagram that illustrates the process for directlyaccessing the work mobile device from a lock screen of a mobilecomputing device.

FIG. 10 illustrates user interfaces for the personal mobile device andthe work mobile device each including a notification bar, a process forexpanding the notification bar from the personal mobile device and thework mobile device, and an expanded notification bar.

FIG. 11 is a flow diagram that illustrates the process for receiving andpresenting notifications received from the work mobile device.

FIGS. 12A, 12B, and 12C each illustrate a different embodiment of thenotification bar.

FIG. 13A illustrates a calendar application running in a mobilecomputing device with no filtering of calendar information between thepersonal and work mobile devices.

FIG. 13B illustrates a calendar application running in a personal mobiledevice of a mobile computing device with partial filtering of calendarinformation from the work mobile device.

FIG. 13C illustrates a calendar application running in a work mobiledevice of a mobile computing device with partial filtering of calendarinformation from the personal mobile device.

FIG. 14 is a flow diagram that illustrates the process for sharinginformation between personal and work mobile devices.

FIG. 15 illustrates a process for configuring a soft keyboard for thework mobile device to be identical to the one used in the personalmobile device.

FIG. 16 illustrates user interfaces for a personal mobile device and awork mobile device, wherein widgets running in the work mobile deviceare displayed even when the user switches to the personal mobile device.

DETAILED DESCRIPTION

FIG. 1A is a schematic illustration of a mobile device according to oneor more embodiments of the invention. The mobile device shown in FIG. 1Ais a personal mobile device 100 having a touch screen 101 and aplurality of keys 102. Personal mobile device 100 may be smartphone, atablet computing device, and in general any computing device that isportable and configured for wireless connectivity with a network.Personal mobile device 100, conceptually, provides access to acompletely separate work mobile device 105 that is generally isolatedand operates separately from personal mobile device 100 (illustrated indashed lines to indicate the work mobile device 105 is running as asoftware component inside personal mobile device 100). As furtherdiscussed below, in one embodiment, work mobile device 105 operates as avirtual machine running within a virtualization platform that is itselfrunning on top of the operating system of personal mobile device 100. Asfurther detailed in FIG. 1B, personal mobile device 100 compriseshardware 110 that includes a framebuffer 115 that stores display dataand drives the user interface display on touch screen 101. Personalmobile device 100 also includes firmware that includes host operatingsystem (OS) 120, and host applications 135 running on top of host OS120. In one embodiment, host OS 120 is the Android™ operating systemprovided by Google, Inc., and includes a composite window manager 125(known in the Android operating system as SurfaceFlinger) that managesand controls access by host applications 135 to framebuffer 115 fordisplay of user interfaces on touch screen 101. In the embodiment ofFIG. 1B, the firmware of personal mobile device 100 also includes avirtualization module 130 that is a trusted operating system levelcomponent that is able to sign, authenticate or otherwise grantprivileged (e.g., superuser) access to certain applications orcomponents running on top of host OS 120. In particular, a hypervisorapplication 140 that is installed on top of host OS 120 interacts withvirtualization module 130 in order to obtain elevated capabilities andexecute in privileged modes. In one embodiment, hypervisor 140 isdownloaded and installed by a user of personal mobile device 100 from anapplication store (e.g., Android Market, iPhone App Store, AmazonAppstore, various carrier or device manufacturer based applicationstores, etc.). Once installed, hypervisor 140 (or a management componentrelated thereto) can establish a connection with the IT department ofthe user's employer and download a work device image 160 (e.g., storedon the file system of host OS 120) that can be accessed by a virtualmachine that is launched by hypervisor 140 to serve as work mobiledevice 105. It should be recognized that, in alternative embodiments,work mobile device 105 may be configured with drivers and otherappropriate virtualization software to interface directly with hardware110 so that work mobile device 105 runs directly on top of hardware 110and host OS 120 is not interposed between work mobile device 105 andhardware 110 (such an embodiment sometimes referred to as a “bare metal”hypervisor, as opposed to a “hosted” hypervisor as depicted in FIG. 1B).

As depicted in FIG. 1B, work mobile device 105 operates as a virtualmachine running on hypervisor 140 and, conceptually, includes a virtualmachine monitor (VMM) 145 and accesses a “virtual disk,” which is shownas work device image 160. VMM 145 may considered a component ofhypervisor 140 (which itself runs as a high priority user-levelapplication on host OS 120) that emulates hardware resources for workmobile device 105 such as a virtual framebuffer 150 that functions as adisplay buffer for work mobile device 105. Work device image 160includes a guest OS 170, which may be any commodity operating systemsuch as the Android operating system and applications 175 running on topof guest OS 170. In the embodiment of FIG. 1B, applications 175 includesa backdoor service application 180 that establishes a directcommunication channel to hypervisor 140 (which itself runs on top ofhost OS 140). Backdoor service application 180 is a “backdoor”application because typical applications running on top of guest OS 170are not aware that they are running in a virtual machine. However,backdoor service application 180 is aware that it is running in avirtual machine on top of hypervisor 140 and can therefore request orprovide special data and services to and from hypervisor 140, forexample, when certain user interface enhancement as further describedbelow between personal mobile device 100 and work mobile device 105 aredesirable. In one embodiment, backdoor service 180 establishes thedirect communication channel with hypervisor 140 by connecting to aunique network port that hypervisor 140 has opened and is listening on,although it should be recognized that alternative embodiment canestablish such a communication channel utilizing different techniques.As will be further discussed, the direct communication channel betweenbackdoor service 180 and hypervisor 140 facilitates remote procedurecalls (RPC) between components existing in personal mobile device 100and work mobile device 105.

As further depicted in FIG. 1B, hypervisor 140 also includes a userinterface (UI) proxy application 155 that, as further detailed herein,serves as a user interface intermediary between personal mobile device100 and work mobile device 105 by copying contents of virtualframebuffer 150 into hardware framebuffer 115, when requested, so thatthe UI environment of work mobile device 105 (hereafter referred to as“work environment”) can be displayed in place of the UI environment ofpersonal mobile device 100 (hereafter referred to as “personalenvironment”).

FIG. 2 illustrates one embodiment of UI environments for personal mobiledevice 100 and work mobile device 105 and a mechanism for switchingbetween the two. As depicted, a personal environment for personal mobiledevice 100 includes a personal desktop 210 that includes icons for avariety of installed applications accessible from personal mobile device100. Personal desktop 210 also includes a work icon 200 and anotification bar 220 that displays system information for personalmobile device 100 (e.g., as time, battery strength, network signalstrength, etc.) as well as notifications from various applications. Whenthe user touches work icon 200 in the personal environment, touch screen101 switches to a work environment for work mobile device 105 anddisplays a work desktop 215. As depicted, work desktop 215 includesicons for a variety of installed applications accessible from workmobile device 105 as well as a home icon 205 that enables the user toswitch back to the personal environment. As further depicted in theembodiment of FIG. 2, the notification bar displayed in work desktop 215is the same notification bar 220 that is generated by personal desktop210 and controlled by host OS 120 (i.e., rather than being a separatenotification bar that is generated by guest OS 170 specifically for workmobile device 105). As such, even while a user is the work environment,notifications generated by applications in the personal environment willbe displayed in notification bar 220 in work desktop 215.

As should be recognized, when displaying the user interface of personalmobile device 100 in FIG. 2, a component of host OS 120 (e.g., such as alauncher application that generates and manages a main navigational userinterface, namely, personal desktop 210) may request composite windowmanager 125 to populate hardware framebuffer 115 with display data forpersonal desktop 210, including notification bar 220. Similarly and asfurther detailed below, when a user selects work icon 200 to enter thework environment, guest OS 170 of work mobile device 105 (e.g., such asa launcher application that generates and manages work desktop 210)ultimately provides composite window manager 125 display data to renderwork desktop 215 in hardware framebuffer 115. However, as previouslydiscussed, display data for notification bar 220 even within workdesktop 215 continues to be provided by host OS 120 and not from guestOS 170 of work mobile device 105 since notification bar 220 originatesfrom personal mobile device 100.

FIG. 3A is a flow diagram that illustrates a process of switching frompersonal mobile device 100 to work mobile device 105. The processincludes steps carried out by host OS 120, UI proxy 155, and hypervisor140 of personal mobile device 100, and steps carried out by VMM 145 ofwork mobile device 105. The process begins at step 302 when host OS 120(e.g., by way of a launcher application in one embodiment) receives userindication of a switch from personal mobile device 100 to work mobiledevice 105. The user indication, as noted above, may be a user selectionof work icon 200 on personal desktop 210. In response to the userindication of the switch (e.g., selection of work icon 200), at step304, host OS 120 requests UI proxy 155 to launch or wake up. Forexample, a launch action associated with work icon 200 causes host OS120 to launch (or wake up) UI proxy 155 in a manner similar to launchactions for other icons displayed in personal desktop 210 for otherapplications 135. In one such embodiment, the launch action associatedwith work icon 200 may be execution of a file system command thatlaunches or wake up an executable file corresponding to UI proxy 155(and possibly to further provide additional command line flags orparameters indicating to UI proxy 155 that it should execute aparticular sequence of actions relating to “powering ON” work mobiledevice 105).

At step 306, UI proxy 155, in response to the request from host OS 120,launches or wakes up. Then, at step 308, UI proxy 155 requestshypervisor 140 to present a lock screen display to the user for thesubmission of credentials (e.g., password, pin, or pattern, etc.) toauthenticate himself for access to work mobile device 105. In response,hypervisor 140 carries out user authentication at steps 310-316. At step310, hypervisor 140 presents a lock screen to the user and prompts theuser for credentials for accessing work mobile device 105. If, at step312, the user fails to provide proper credentials, then authenticationfails at step 314. If, at step 312, the user enters proper credentials,hypervisor 140 may launch or otherwise wake up a VMM 145 thread andtransmit a virtual power ON command to VMM 145 to wake up work mobiledevice 105 (step 316).

At step 318, VMM 145 receives the virtual power ON command fromhypervisor 140 and, at step 320, wakes up work mobile device 105 byemulating a hardware power ON action for work mobile device 105. Thisemulation causes guest OS 170 to wake up and begin populating virtualframebuffer 150 with display data that includes work desktop 215.

Returning to UI proxy 155, upon receiving confirmation from VMM 145 thatwork mobile device 105 has powered ON, UI proxy 155, at step 322, copiesor updates contents of virtual framebuffer 150 into a local memorybuffer available from host OS 120. Then, at step 324, UI proxy 155requests composite window manager 125 to copy contents of the localbuffer into hardware framebuffer 115 to display contents of the localbuffer which includes work desktop 210 on touch screen 101 (it should berecognized that notification bar 220 is already displayed on touchscreen 101 and therefore is not part of the display data taken from thelocal memory buffer). It should be recognized that in alternativeembodiments, UI proxy 155 may be able to leverage hardware enhancementsprovided by hardware 110 of personal mobile device 110 to increaseperformance and reduce the amount of copying of display data (e.g.,between virtual framebuffer 150 to a local memory buffer to hardwareframebuffer 115, etc.) for example by requesting composite windowmanager 125 to redirect hardware framebuffer 115 to receive datadirectly from virtual framebuffer 150. It should also be recognized thatalternative embodiments may not implement all steps described in FIG.3A. For example, one alternative embodiment (as further describedherein) may not require hypervisor 140 to present a lock screen toauthenticate the user prior to enabling the user to access the workenvironment.

FIG. 3B is a flow diagram that illustrates a process of switching fromwork mobile device 105 to personal mobile device 100. The processincludes steps carried out by guest OS 170, backdoor service 180, andVMM 145 of work mobile device 105, and steps carried out by host OS 120of personal mobile device 100. The process begins at step 330 when guestOS 170 (e.g., by way of a launcher application running on guest OS 170)receives user indication of a switch from work mobile device 105 topersonal mobile device 100. The user indication, as noted above, may bea user selection of home icon 205 on work desktop 215. In response tothe user indication of the switch, at step 332, guest OS 170 requestsbackdoor service 180 to terminate UI proxy 155.

At step 334, backdoor service 180, in response to the request from guestOS 170, triggers a power OFF action on work mobile device 105 in VMM145, where in response to this trigger, VMM 145 emulates the pressing ofa hardware power button at step 336 causing work mobile device 105 tostop updating virtual framebuffer 150. Then, at step 338, backdoorservice 180 transmits a message to UI proxy 155 via hypervisor 140 toterminate.

At step 340, host OS 120 receives a message from hypervisor 140 toterminate UI proxy 155 which would terminate any updates to hardwareframebuffer 115 based on changes to virtual framebuffer 150. As such, atstep 342, host OS 120 terminates or puts to sleep UI proxy 155. Afterthe UI proxy 155 is terminated or put to sleep, at step 344, host OS 120returns control of touch screen 101 to the last visited application ofpersonal mobile device 100 (i.e., prior to having switched to the workenvironment), thereby causing the application to request compositewindow manager 125 populate hardware framebuffer 115 in order to renderits user interface on touch screen 101. In one embodiment, such a lastvisited application may be the launcher application of host OS 120itself which renders personal desktop 210. In alternative embodiments,after the UI proxy 155 is terminated or put to sleep, host OS 120 mayinstead return to a lock screen asking the user to reauthenticatehimself prior to giving the user access to personal mobile device 100.

It should be recognized that the switching between the personalenvironment and the work environment may be carried out in a number ofdifferent ways, including the one shown in FIG. 2 and detailed in FIGS.3A and 3B. In one alternative embodiment, personal mobile device 100 mayinclude a hardware button that triggers switching between the personalenvironment and work environment as discussed above. FIG. 4 furtherillustrates another user interfaces for personal mobile device 100 andwork mobile device 105 and another process for switching between thetwo. In this embodiment, the personal environment and the workenvironment are laid out side-by-side with the personal environmentappearing in a center or main page 4 (of 7 pages of a “global” desktop)as shown by page indicator 400 and the work environment appearing inpage 5 as shown by page indicator 400. The switching from the personalenvironment to the work environment is carried out by a right-to-leftswipe on touch screen 101. The switching from the work environment tothe personal environment is carried out by a left-to-right swipe ontouch screen 101.

To implement the switching functionality described above in conjunctionwith FIG. 4, host OS 120 (or its the launcher application) is modifiedto recognize the right-to-left swipe and left-to-right swipe motions.That is, the right-to-left swipe motion causes the same actions to betaken as touching work icon 200 in FIG. 2 and detailed in FIG. 3A,namely that UI proxy 155 is launched or woken up so that contents ofvirtual framebuffer 150 are copied into hardware framebuffer 115 fordisplay on touch screen 101. Similarly, the left-to-right swipe motioncauses the same actions to be taken as touching home icon 205 in FIG. 2and detailed in FIG. 3B, namely that UI proxy 155 is terminated or putto sleep so that contents of virtual framebuffer 150 are no longercopied into hardware framebuffer 115 for display on touch screen 101. Itshould be recognized that the user interface techniques for switchingbetween the personal and work environment in FIGS. 2 and 4 are merelyexemplary and that alternative user interface switching techniques maybe implemented consistent with the teachings herein. For example, analternative user interface switching technique may utilize a hardwarebutton on personal mobile device 100 to trigger the switching processessimilar to those described in FIGS. 3A and 3B. Similarly, other swipingmotions (up-down direction, diagonal direction, etc.) may be utilized toperform such switching.

It should be noted further that, when the user switches from thepersonal environment to the work environment in certain embodimentsimplementing the techniques described above, a lock screen may appearprompting the user to enter his credentials (password, pattern, etc.)prior to allowing the user access to the work environment (e.g., asdescribed in steps 308-316 of FIG. 3A). However, when the user switchesfrom the work environment to the personal environment, a lock screen maynot be necessary since a user that has authenticated access to the workenvironment can be presumed to also have authority to access thepersonal environment. Similarly, if the user goes straight into the workenvironment from an initial lock screen presented by personal mobiledevice 100 as may be possible in the methods described below inconjunction with FIGS. 8A- 8C, a lock screen may not be necessary whenthe user switches to the personal environment based the samepresumption. It should be recognized that the converse may not be truebecause a personal password or pattern may have been shared by membersof the user's family and as a result a lock screen upon switching to thework environment becomes necessary. It should be further recognized thatin situations where the work password or pattern can be shared, e.g.,with enterprise IT personnel, it would be beneficial to display a lockscreen upon switching to the personal environment from the workenvironment.

In addition to prior described embodiments that provide that acapability to switch between user interfaces for the personalenvironment and work environment, FIG. 5A illustrates a unified homescreen 500 that includes UI elements of both personal mobile device 100and work mobile device 105. In the particular embodiment of FIG. 5A,unified home screen 500 is managed by host OS 120 and includes UIelements of personal mobile device 100 that are illustrated with a thinborder (e.g., icon 501 for the photo gallery application) as well as UIelements of work mobile device 105 that are illustrated with a thickborder (e.g., icon 502 for the contacts application). In one suchembodiment, prior to displaying unified home screen 500, the user wouldhave been prompted for his work password or pattern (and have beensuccessfully authenticated). In certain of such embodiments, if the userwas not able to successfully authenticate using his work password andwas provided an alternative option to authenticate using his personalpassword, unified home screen 500 would display only the UI elements ofpersonal mobile device 100 (i.e., if the personal password wassuccessfully authenticated). It should be recognized that the thin andthick borders are only exemplary of how application icons may beimplemented to distinguish between applications in the personal and workenvironments. For example, one alternative embodiment may use differentcolor borders around the application icons or a personal or work “badge”(i.e., smaller icon) overlaid on top of the application icon.

FIG. 5C is a flow diagram that illustrates a process of presenting UIelements of work mobile device 105 in unified home screen 500 of FIG. 5Aand launching applications in response to selections of such UIelements. The process includes steps carried out by backdoor service 180of work mobile device 105, and steps carried out by UI proxy 155,hypervisor 140, and host OS 120 of personal mobile device 100.

At step 510, backdoor service 180 obtains a list of installedapplications from guest OS 170 (e.g., from a package manager applicationthat manages installed applications for guest OS 170 in one embodiment)to forward to host OS 120 for display in unified home screen 500.Backdoor service 180 also registers with guest OS 170 to receivenotifications any time a user operating in the work environment installsa new application on work mobile device 105 (e.g., added to the launcherapplication running on guest OS 170). At step 512, backdoor service 180forwards the list and, subsequently, upon notification of aninstallation of a new application into guest OS 170, forwards suchnotification, to hypervisor 140. Hypervisor 140 receives the list ornotification from backdoor service 180 at step 514, and then, at step516, hypervisor 140 generates or modifies metadata for each installedapplication to include a callback to launch UI proxy 155 when theapplication is selected from unified home screen 500. For example, inone embodiment, metadata relating to a launch action for each workenvironment application in the list (e.g., application icon, name of theexecutable file for the application, etc.) is provided with the list instep 514. Because the name of the executable file for the workenvironment application would not be understood by host OS 120 becausethe file does not reside in the file system managed by host OS 120, instep 516, hypervisor may generate or modify the received metadata (e.g.,to include the application icon, name of UI proxy 155, and name of theexecutable file for the application in the work environment as aparameter that would be understood by UI proxy 155) so that host OS 120calls or executes UI proxy 155 as a proxy instead of calling orexecuting the name of the executable file for the application itself(since such a call or execution would result in an error in host OS 120as such an executable file does not exist).

At step 518, hypervisor 140 forwards the modified metadata of theinstalled applications to host OS 120 so host OS 120 can display workapplication icons relating to the applications in the work environment.At step 520, host OS 120 receives (e.g., via the launcher application)the modified metadata of the installed applications from hypervisor 140and displays the work application icons (e.g., received as part of themodified metadata) relating to the applications in unified home screen500. As previously discussed above, host OS 120 (e.g., the launcherapplication) may further associate a call to UI proxy 155 (i.e.,including a unique identifier, such as the name of the executable filefor the application in the work environment receive as part of themetadata) with launch actions relating to such work application icons.

As such, in order to launch of an application residing in the workenvironment from unified home screen 500, at step 522, host OS 120receives (e.g., via the launcher application) a user selection of a workapplication icon. Then, at step 524, host OS 120, as part of the launchaction associated with the work application icon, requests UI proxy 155to launch or wake up. The request includes a parameter (e.g., name ofthe executable file for the application in the work environment)identifying to UI proxy 155 the application installed in work mobiledevice 105 that corresponds to the work icon (hereafter referred to asthe “selected application”). UI proxy 155, at step 526, launches orwakes up upon receiving such request from host OS 120. At step 528, UIproxy 155 requests hypervisor 140 to wake up work mobile device 105 andlaunch the selected application. Then, hypervisor 140, at step 530,wakes up work mobile device 105 by emulating power ON via VMM 145, andforwards the request to launch the selected application to backdoorservice 180. At step 532, backdoor service 180 requests guest OS 170 tolaunch the selected application. As a result, virtual framebuffer 150beings filling up with display data for the selected application.Asynchronously with steps 530 and 532, UI proxy 155 continually copiescontents of virtual framebuffer 150 (or updates to such contents) into alocal memory buffer in the personal environment in at step 534 andrequests composite window manager 125 to copy contents of local bufferinto hardware framebuffer 115 at step 536 so that display data of theselected application can be displayed on touch screen 101. As notedabove, in some embodiments, UI proxy 155 requests composite windowmanager 125 to redirect hardware framebuffer 115 to receive data fromvirtual framebuffer 150 using hardware acceleration functions providedin personal mobile device 100 to reduce the number of copying.

As an example of another user interface that displays work and personalelements in a unified manner, FIG. 5B illustrates a display of a unifiedtask manager 505 for active applications from both personal mobiledevice 100 and work mobile device 105. In this display, which appears inresponse to a long press on a “home” key as shown in FIG. 5B, activeapplications from personal mobile device 100 (e.g., a browserapplication 506 and music application) and active applications from workmobile device 105 (e.g., email application 507 and contacts application)are both listed.

FIG. 5D is a flow diagram that illustrates a process of presentingactive applications from work mobile device 105 in the display ofunified task manager 505 of FIG. 5B. The process includes steps carriedout by host OS 120 and hypervisor 140 of personal mobile device 100, andsteps carried out by backdoor service 180 of work mobile device 105. Atstep 540, host OS 120 recognizes a user input (e.g., long press on ahome key) indicating that the user would like to view activeapplications. Then, at step 542, host OS 120 requests hypervisor 140 tocommunicate with backdoor service 180 to obtain a list of activeapplications running in the work environment (e.g., from an activitymanagement service running in guest OS 170). In one embodiment, thecommunication channel between hypervisor 140 and backdoor service 180 isestablished using remote procedure call (RPC). Hypervisor 140, at step544, receives the request from host OS 120, and at step 546, accordinglyforwards the request to backdoor service 180. At step 548, backdoorservice 180 receives the request forwarded by hypervisor 140 and, atstep 550, queries guest OS 170 (e.g., its activity management service)for a list of active applications. At step 552, backdoor service 180receives the list from guest OS 170 and forwards the list to hypervisor140. Hypervisor, at step 554, receives the list forwarded by backdoorservice 180 and forwards the list to host OS 120. Host OS 120 receivesthe list at step 556, and queries an activity management service runningthereon for a list of active applications running in the personalenvironment at step 558. At step 560, the two lists are combined anddisplayed together in touch screen 101, as depicted in FIG. 5B.

In addition to switching between personal and work environmentsutilizing work and personal icons as in FIG. 2 or swiping motions as inFIG. 4 or utilizing a unified home screen as in FIG. 5A, alternativeembodiments may utilize other techniques to switch between personal andwork environments. FIGS. 6A and 6B illustrate another alternative userinterface for such switching. In FIG. 6A, personal mobile device 100includes a notification bar 220 having a work icon 600 for switching theuser to work mobile device 105. Similarly, FIG. 6B illustrates a userinterface for work mobile device 105 that includes notification bar 220having a personal icon 605 for switching the user to personal mobiledevice 100. In both cases, by, for example, swiping down on notificationbar 220 to expand it, a user can subsequently select work icon 600 orpersonal icon 605 to switch to the work environment or personalenvironment, respectively. In one embodiment, when UI proxy 155 islaunched or woken up to provide hardware framebuffer 115 with the workdesktop 215 (as further detailed in steps 306, 308, 322 and 324 of FIG.3A), UI proxy 155 may additionally transmit a notification request tohost OS 120 requesting a display of personal icon 605 in notificationbar 220, that when selected by the user, switches the user from the workenvironment to the personal environment in a manner similar to the stepsof FIG. 3B. Similarly, when a user selects personal icon 605 to switchto the personal environment, the termination of UI proxy 115 asdescribed in steps 340-342 in FIG. 3B may include an additional step torequest host OS 120 to display work icon 600 in notification bar 220,that when selected by the user, switches the user back to the workenvironment in a manner similar to the steps of FIG. 3A.

In addition to the challenges of switching between personal and workenvironments as discussed above, there also exist challenges for a userto be reminded whether he is currently accessing an application launchedfrom the work or personal environment once that application has beenlaunched. As such, FIGS. 7A and 7B are schematic illustrations of amobile computing device that is configured in different ways to notify auser of the environment the user is working in. The notificationmechanisms described herein are useful because an application that auser has launched often occupies the entire display area and separateinstances of the application may be available in both the personal andwork environments. As a result, the user may not be recall theenvironment from which the application was launched.

The notification mechanism shown in FIG. 7A is a lighted trackball 701that turns to one color, e.g., green, when an application is launchedfrom the personal environment, and turns to another color, e.g., blue,when an application is launched from the work environment. Thenotification mechanism shown in FIG. 7B is a colored backlight 702 thatappears around the border of the application. The backlight turns to onecolor, e.g., green, when an application is launched from the personalenvironment, and turns to another color, e.g., blue, when an applicationis launched from the work environment.

Access to personal and work environments also pose challenges from asecurity perspective. In particular, it may be desirable to streamlineaccess to personal and work environments by minimizing repetitive accessto lock screens for both personal and work environments while switchingbetween the environments. As previously discussed, in certainembodiments, a work password may be sufficient to provide access to boththe personal and work environments. As such, FIGS. 8A-8C each illustratea lock screen of personal mobile device 100 and a different process forentering either the personal mobile device or the work mobile devicefrom the lock screen. Lock screen 800 of FIG. 8A requires an entry ofpassword and a swipe for entry into either the personal environment orthe work environment. The entry of the correct personal passwordcombined with a right-to-left swipe provides access to the personalenvironment. In contrast, the entry of the correct work passwordcombined with a left-to-right swipe provides access to the workenvironment. Lock screen 805 of FIG. 8B requires an entry of differentpasswords for entry into the personal environment and the workenvironment. The entry of the correct personal password (without anyadditional swipe motions) provides access to the personal environmentwhile the entry of the correct work password (without any additionalswipe motions) provides access to the work environment. Lock screen 810of FIG. 8C requires an entry of different patterns for entry into thepersonal environment and the work environment. The entry of the correctpersonal pattern provides access to the personal environment while theentry of the correct work pattern provides access to the workenvironment.

FIG. 9 is a flow diagram that illustrates a process for directlyaccessing work mobile device 105 from a lock screen presented bypersonal mobile device 100 such as those lock screens depicted in FIGS.8A-8C. It should be recognized, however, that alternative embodimentsmay utilize different lock screens with different swiping motions (e.g.,up-down motions, diagonal motions, etc.) or alternative userinteractions. The process includes steps carried out by host OS 120 andUI proxy 155 of personal mobile device 100, and steps carried out by VMM145 of work mobile device 105. The process begins at step 902, when hostOS 120 receives a user credential (e.g., password or pattern) throughthe lock screen. Host OS 120 carries out the step of authenticating theuser credential at step 904. If the authentication is unsuccessful theprocess fails at step 907. If the authentication is successful in step904, host OS 120 determines at step 906 whether the user credential isvalid for accessing the personal environment and, if so, provides accessto the personal environment at step 908. If host OS 120 determines atstep 906 that the user credential is valid for accessing the workenvironment, then steps 910-922 are carried out.

At step 910, host OS 120 requests hypervisor 140 to launch or wake up athread for VMM 145 to transmit a virtual power ON command to work mobiledevice 105. The action taken by host OS 120 in step 910 is to analogousto the action taken by host OS 120 in step 308 of FIG. 3A, however,because host OS 120 has already authenticated the user through the lockscreen presented by personal mobile device 100 in steps 902-906, host OS120 is able to transmit a “trusted” request to hypervisor 140 ratherthan requesting hypervisor to yet again present a lock screen to theuser to access work mobile device 105 as in step 308 of FIG. 3A. At step912, the trusted request is received by VMM 145. Then, at step 914, VMM145 causes work mobile device 105 to wake up and begin populatingvirtual framebuffer 150 with display data for the work environment(e.g., similar to step 320 of FIG. 3A). UI proxy 155 then continuallycopies contents of virtual framebuffer 150 (or updates to such contents)into local memory buffer in personal mobile device 100 at step 916 andrequests composite window manager 125 to copy contents of the localmemory buffer into hardware framebuffer 115 at step 918 so that displaydata for the work environment can be displayed on touch screen 101.Asynchronously with steps 912-918, steps 920 and 922 are carried outafter step 910. At step 920, host OS 120, requests hypervisor 140 tolaunch or wake up UI proxy 155 (e.g., so that UI proxy 155 is able toperform steps 916-918) and at step 922, UI proxy 155 is launched orwoken up. It should be recognized that in the embodiment as describedabove, the work password is authenticated by host OS 120. In alternativeembodiments, the work password may still be captured by lock screenpresented by host OS 120 (e.g., step 902) but instead is passed to andauthenticated by guest OS 170 once work mobile device 105 has beenpowered on.

In addition to the user interface challenges posed by switching betweenpersonal and work environments as well as by repetitive lock screens,additional challenges arise when ensuring that notifications generatedby applications in the work environment are properly received while theuser is working in the personal environment (and vice versa). Aspreviously discussed, in an embodiment such as that depicted in FIG. 2,the same notification bar 220 that is generated and managed by host OS120 is displayed regardless of whether the user is in the personal orwork environment. FIG. 10 further details how such a notification bar220 may receive notifications as well as how it may display detailedinformation regarding the notifications when expanded by the user. Inparticular, FIG. 10 depicts a notification bar 220 that is displayed onboth personal mobile device 100 and work mobile device 105 and includesnotifications 1000 (on the left side of notification bar) generated fromindividual applications that are running in either personal mobiledevice 100 or work mobile device 105 (as well notifications that aredisplayed on the right side of the notification bar relating tosystem-level functions such as time, battery life and network signalstrength, which are typically common to both the personal and workenvironments). As depicted, notifications 1000 include a notification ofnew email from an email application in the personal environment, anotification of new email from an email application in the workenvironment, and a missed call notification from a phone application inthe personal environment.

As illustrated in FIG. 10, a top-to-bottom swipe on notification bar 220expands notification bar 220 to provide further details regardingdisplayed notifications (as well as enables the user to further launchapplications related to such notifications by selecting thenotifications in the expanded view). In the embodiment of FIG. 10,expanded notification bar 1005 provides additional details on thenotifications, including whether the notification is generated from thepersonal or work environments. It should be recognized that although theembodiment of FIG. 10 displays separate lists corresponding tonotifications 1000 generated by applications in the personal or workenvironments, other alternative embodiments may utilizes othertechniques to distinguish between notifications generated from thedifferent environments, including color-coding the notifications.

FIG. 11 is a flow diagram that illustrates a process for receiving andpresenting notifications received from applications running in workmobile device 105 in notification bar 220. The process is executedregardless of whether work mobile device 105 is in the foreground or inthe background because, as described earlier, display data fornotification bar 220 is controlled and managed by host OS 120. Theprocess includes steps carried out by an application 175 whose activityis prompting a notification to be displayed in notification bar 220 anda backdoor service 180, both of work mobile device 105, and stepscarried out by hypervisor 140 and host OS 120 of personal mobile device100.

In accordance with the embodiment of FIG. 11, in step 1102, backgroundservice 180 generally registers (for example, upon launch) with guest OS170 (or with its notification management service) to be notified of anyrequests from other applications or services running on guest OS 170that request guest OS 170 to present notifications in a notification barcontrolled by guest OS 170 (which as discussed above, is actually notdisplayed or rendered on touch screen 101, since notification bar 220controlled by host OS 220 is always displayed). As such, when, at step1104, some activity at application 175 prompts application 175 torequest a notification to be displayed in notification bar 220 (e.g., anemail application may have received new email, a calendar applicationmay have an imminent appointment upcoming, a telephone call may havebeen missed, etc.), backdoor service 180 receives notice of thenotification request of application 175 from guest OS 170 at step 1106.At step 1108, backdoor service 180 forwards the notification request tohypervisor 140. Hypervisor 140, at step 1110, receives the forwardednotification request and, at step 1112, transmits a correspondingrequest to a notification management service in host OS 120 to displaythe requested notification in notification bar 220. In one embodiment,such a corresponding notification request includes information toassociate the notification with hypervisor 140 and a tag uniquelyidentifying the notification (e.g., name of application 175 in workmobile device, etc.) so that, upon user selection of the notification,hypervisor 140 can assist with launching the corresponding application175 running in work mobile device 105. The notification managementservice of host OS 120 receives the forwarded notification request atstep 1114. Then, at step 1116, the notification management service ofhost OS 120 displays the requested notification in notification bar 220.Subsequently, when a user (whether working in the personal or workenvironment) expands notification bar 220 (e.g., as depicted in FIG. 10)and selects the displayed notification, host OS 120 (or its notificationmanagement service), utilizing the information provided by hypervisor140 in the corresponding notification request at step 1112, callshypervisor 140 and provides it with the unique tag identifyingapplication 175, thereby enabling hypervisor 140 to request backdoorservice 180 to launch or wakeup application 175 in work mobile device105 (and, if needed, “power on” work mobile device 105 via UI proxy 155to display application 175 in work mobile device 105).

In addition to the leveraging the pre-existing structure andfunctionality of notification bar 220 of personal mobile device 100 topresent notifications for both work and personal environments aspreviously discussed above, alternative embodiments may enhance thefunctionality of notification bar 220 or otherwise implement an entirelynew notification bar (and notification management system) that is awareof the distinctions between personal and work environments. FIGS.12A-12C each illustrate examples of different embodiments of suchnotification bars. FIG. 12A illustrates a “filtered” notification bar1100 that separates personal notifications and work notifications. Apersonal notification indicator 1105 helps the user identify thepersonal notifications, and a work notification indicator 1110 helps theuser to identify work notifications. FIG. 12B illustrates a similarfiltered notification bar 1115 having personal notifications 1120 andwork notifications 1125 that are differentiated by color. All personalnotifications are displayed in one color, e.g., green, and all worknotifications are displayed in another color, e.g., blue.

In certain scenarios, system-level notifications such as network signalstrength that are typically displayed on the right side of anotification bar and can shared between the personal and workenvironments may be different for such environments. For example, in onesuch scenario, personal mobile device 100 may have a phone number thataccesses the telephony services of one carrier while work mobile device105 may have a different phone number that accesses the telephonyservices of a different carrier. At any particular geographic location,the cellular signal strengths of the two carriers may differ. As such,FIG. 12C illustrates a filtered notification bar 1130 that displays a“persistent” work icon 1200 with one or more “badges,” where the badgesmay relate to system-level status information particular to work mobiledevice 105. As shown in FIG. 12C, a badge 1205 is overlaid on persistentwork icon 1200 to indicate signal strength for a cellular network of acarrier utilized by work mobile device 105 (which is different than thecarrier used by personal mobile device 100). It should be recognizedthat the particular user interfaces relating to notifications in FIGS.10-12C are merely exemplary and other user interfaces may be utilizedconsistent with the teaching herein. For example, alternativeembodiments may offer audio notifications that can be configured toproduce different sounds depending on the source of the notification(e.g., personal or work environments). Similarly, notifications viavibrations may be configured to produce different vibration patternsdepending on the source of the notification. Color notifications throughtrackballs or LEDs are also possible, where different colors areassigned to personal and work notifications, respectively.

In addition to user interface challenges as previously discussedrelating to switching between work and personal environments,streamlining secured access through lock screens and presentingnotifications, there also exist other user interface challenges whenthere is a desire to provide some level of access to data in the workenvironment or personal environment while the user is operating in theother environment. For example, a user may find it desirable to accesswork-related appointments stored in the work environment while accessinghis personal calendar application in the personal environment (i.e.,without completely switching environments and applications). As such,FIG. 13A illustrates a calendar application 1300 running in a mobilecomputing device (either in the personal or work environment) with nofiltering of calendar information between personal and workenvironments. Calendar application 1300 is referred to as “unified”calendar application because appointments and other calendar events areopenly shared between personal mobile device 100 and work mobile device105.

However, an embodiment as illustrated in FIG. 13A may be inconsistentwith an employer's security policies. For example, the user's employermay consider certain information that may be revealed when accessing awork-related appointment (e.g., colleague email addresses, confidentialsubject headings, etc.) to be confidential. Similarly, a user mayconsider certain information in personal-related appointments to beinappropriate in the work environment, particularly if the user'swork-related calendar can be accessed by other employees. As such, FIGS.13B and 13C illustrate embodiments a unified calendar applications thatfurther implement “partial sharing” of information between the personaland work environments. As depicted in FIG. 13B, a unified calendarapplication 1305 in the personal environment does not provide anydetails regarding a time slot that has been occupied with a work-relatedappointment other than an indication that the time slot is “Busy” with awork related appointment. Similarly, a unified calendar application 1310in the work environment, as depicted in FIG. 13C, does not provide anydetails regarding a time slot that has been occupied with apersonal-related appointment other than an indication that the time slotis “Busy” with a personal-related appointment.

It should be recognized that the calendar application examples depictedin FIGS. 13A-13C are merely exemplary and that calendar information isjust one type of information that can be shared between the personal andwork environments at varying levels of detail. For example, contactinformation is another type of information that can be similarlyconsidered. A user operating in the personal environment may see thenames and phone numbers of contacts maintained within work mobile device105, but may be blocked from obtaining the contact's job title ande-mail address. As such, if a telephone call comes in through the user'spersonal line but from a work contact, there is sufficient informationsharing between the two environments that the work contact can beidentified as the originator of the call. Another example where somecontact information sharing between the two environments may be usefulis telephone calls originated by the user from the personal environmentto a work contact or from the work environment to a personal contact. Insuch cases, there should be a transparent switch in environments so thata telephone call to a personal contact should use the personal wirelesssubscription plan and a telephone call to a work contact should use thework wireless subscription plan. Another example of an application thatcan benefit from levels of sharing between personal and workenvironments are multimedia applications such as a picture galleryapplication. For example, an employer may allow images from awork-related picture gallery to be accessed by a personal-relatedpicture gallery at lower resolution. For example, if the user'swork-related picture gallery includes confidential and detailedarchitectural designs, a low resolution version of designs that areaccessible in the personal environment will not compromise theconfidentiality of the designs since the low resolution version will notprovide sufficient detail.

FIG. 14 is a flow diagram that illustrates a process for sharinginformation between corresponding applications in personal mobile device100 and work mobile device 105 to achieve user interface functionalitysimilar to FIGS. 13A-13C. The process includes steps carried out by abackdoor service 180 of work mobile device 105, and steps carried out byhypervisor 140 of personal mobile device 100.

At step 1402, backdoor service 180 (e.g., upon work mobile device 105being powered on) obtains a list of available “information providers”from guest OS 170. Such information providers can be local databases orremote data sources that a user may register with a particularapplication to access. For example, with respect to an emailapplication, information providers may be the employer's email server orthe user's online email account. With respect to a calendar or contactsapplication, information providers may be a local calendar or contactsdatabase on the device, the employer's PIM server or the user'scalendaring functions in his online email or social network account. Atstep 1404, backdoor service 180 requests hypervisor 140 to register theobtained list of information providers with host OS 120. When, at step1406, hypervisor 140 receives the list of information providers frombackdoor service 180, then, at step 1408, hypervisor 140 generates (ormodifies information obtained from the list of information providers)registration information to provide to host OS 120 to register the listof information providers from the work environment for access byapplications running in the personal environment and, at step 1408,provides such registration information to host OS 120. In oneembodiment, generating such registration involves associating hypervisor140 (e.g. via a callback) with the information provider, such that whenan application (e.g., calendar application, contacts application, etc.)in the personal environment requests information from the informationprovider, host OS 120 calls hypervisor 140 to assist in reaching theinformation provider in the work environment (e.g., by serving as a stubfor an RPC communication with backdoor service 180, etc.).

At step 1412, backdoor service 180 also request hypervisor 140 toprovide a list of information providers originating from host OS 120 sothat these information providers can be made available for access byapplications running on guest OS 170 in the work environment. Whenhypervisor 140 receives this request at step 1414, it obtains the listof information providers registered with host OS 120 and provides it tobackdoor service 180 in step 1416. When, at step 1418, backdoor service180 receives the list of information providers from hypervisor 140,then, in a manner similar to that performed by hypervisor 140 in step1408, backdoor service 180 generates registration information (at step1420) for the received list of information providers that it uses toregister the information providers with guest OS 170 (at step 1422) sothat that backdoor service 180 gets called by guest OS 170 to assist inreaching the information provider in the personal environment (e.g., byserving as a stub for an RPC communication with hypervisor 140, etc.)when an application in the work environment requests information fromsuch information provider.

Once hypervisor 140 registers information providers from the workenvironment in the personal environment in step 1410 and backdoorservice 180 registers information from the personal environment in thework environment in step 1422, then applications in each environmentwill have access to information providers in the other environment. Forexample, if the calendar application in the work environment requestsaccess to the local calendar database in the personal environment (e.g.,an information provider), then backdoor service 180 will accordinglyreceive a callback in step 1424 and, in step 1426, will establish acommunication channel (e.g., RPC) with hypervisor 140 in order toestablish a connection with the local calendar database in the personalenvironment. When hypervisor 140, at step 1428 establishes thecommunication channel with backdoor service 180 and connects to thelocal calendar database, then, at step 1430, if required (as in theembodiment of FIG. 13C), hypervisor 140 applies any relevant filters tothe information provided by the local calendar database beforetransmitting it to the calendar application in the work environment (viathe RPC channel with backdoor service 180). Steps 1432-1438 depict asimilar flow on the personal environment side, for example, when acontacts application in the personal environment requests access to thelocal contacts database in the work environment.

It should be recognized that the flow of FIG. 14 is merely exemplary ofhow data can be filtered and shared between the personal and workenvironments to provide user interface capabilities such as thosedepicted in FIGS. 13A-13C. In particular, FIG. 14 depicts a flow toshare data between the personal and work environments when the filesystems of host OS 120 and guest OS 170 are separated and cannot beaccessed by the other operating system (e.g., work device image 160which represents the virtual disk accessible by work mobile device 105is an encrypted file stored on the file system of host OS 120, but canonly be accessed by guest OS 170 and not host OS 120 due to suchencryption). However, in alternative embodiments, where guest OS 170 andhost OS 120 may share access to a common file system, the userinterfaces depicted in FIGS. 13A-13C may be implemented in a mannerdifferent from the flow of FIG. 14.

In addition providing user interfaces that enable sharing at variouslevels of information between corresponding personal and workenvironment applications as detailed in FIGS. 13A-14, users may furtherfind it desirable to share certain user interfaces themselves betweenpersonal and work environments. For example, once accustomed to acertain look and feel of a soft keyboard in the personal workenvironment, a user may desire to utilize the same soft keyboard in thework environment. As such, FIG. 15 illustrates a process for configuringa soft keyboard for work mobile device 105 to be identical to the oneused in personal mobile device 100. Soft keyboard 1500 for personalmobile device 100 is shown in FIG. 15 as part of personal desktop 210.Soft keyboard 1500 may be a default soft keyboard application or a softkeyboard application acquired by other means (e.g., downloaded from anapplication store or market, etc.). Due to standard configurations of anemployer's IT department for work device image 160, the default softkeyboard application 1505 for work mobile device 105 may not be the one1500 used in personal mobile device 100. As depicted in the embodimentof FIG. 15, on boot-up of mobile work device 105, hypervisor 140 querieshost OS 120 for its active soft keyboard application, and then uploadsand installs the application package for the soft keyboard applicationinto guest OS 170 (e.g., by providing the application package tobackdoor service 180 which in turn installs the application package intoguest OS 170 as the active soft keyboard for guest OS 170). It should benoted that in this particular embodiment, two separate instances of thesame soft keyboard application are executing in the differentenvironments and therefore each instance will maintain its own statewithin its own environment (e.g., dictionary of recognized words, etc.).As a result, if a dictionary corresponding to the soft keyboard instancein the work environment contains vocabulary for any confidential terms,the confidentiality of such terms are preserved in the work environmentand are not leaked to the personal environment.

Similarly, users may find it desirable to view or access in oneenvironment the user interface of a “widget” that corresponds to anapplication running in the other environment. For example, a user thatis an IT administrator may have an IT administration applicationinstalled in his work environment that enables him to remotely managethe IT infrastructure of his employer. As is common with mobileapplications, the IT administration application may include a “widget”option that can be displayed in a portion of work desktop 215 to providea “mini” view of the status of the employer's IT systems (i.e., withoutlaunching the entire IT management application itself). As such, FIG. 16illustrates an example of such a widget corresponding to an applicationin one environment that can be displayed in the other environment. Asdepicted, the user can not only configure IT administration application1600 to display its widget 1605 in work desktop 215, but can alsoconfigure the personal desktop 210 in the personal environment todisplay the widget even though IT administration application itself isnot installed in the personal environment. In order to enable the userto configure personal desktop 210 to display the widget corresponding tothe IT administration application installed in the work environment, thelauncher application of host OS 120 which manages and controls personaldesktop 210 must be able to find and install the widget. Similar to thesteps described in FIG. 14 to expose information providers in oneenvironment to the other environment, backdoor service 180 andhypervisor 140 communicate (e.g., via RPC, etc.) to exchange informationabout widgets that can be displayed by the launcher applications intheir respective work and personal environments. For example, uponboot-up of work mobile device 105, backdoor service 180 may provide alist of widgets from guest OS 170 to hypervisor 140. Hypervisor 140 mayprovide the list of widgets to host OS 120 (or its launcher application)and subsequently serve as an proxy RPC channel to communicate withbackdoor service 180 (which in turn communicates with the correspondingapplication of the widget) when the user in the personal environmentselects one of the widgets from the work environment to display onpersonal desktop 210. In this manner, the application in the workenvironment corresponding to the displayed widget in the personalenvironment has a RPC connection (via backdoor service 180 andhypervisor 140) to periodically transmit updated display data to the“live” widget (i.e., continuously showing updated data) displayed onpersonal desktop 210. It should be recognized that further features orenhancements may be added onto such a widget sharing function. Forexample, a sharing policy of widgets may be enforced using a white listand a black list or data displayed by widgets can be further filtered tocontrol the level of information that can be shared.

Although one or more embodiments of the present invention have beendescribed in some detail for clarity of understanding, it will beapparent that certain changes and modifications may be made within thescope of the claims. For example, while embodiments herein have referredto certain mobile operating systems such as Android, it should berecognized that any mobile operating systems may be utilizing inalternative embodiments such as Apple's iOS, Research in Motion'sBlackberry OS, Microsoft's Windows Phone, Hewlett Packard's webOS,Symbian, Java, and the like. Similarly, embodiments herein may havereferred to certain functions and components using terminology morecommon used in certain mobile operating systems as compared to others(e.g., launcher application, package manager application, compositewindow manager, etc.). It should be recognized that use of suchterminology is merely exemplary not meant to limit the scope of theteachings herein to any particular operating system and thatcorresponding functions and components in other operating systemplatforms may benefit from the teachings herein. Furthermore, it shouldbe recognized that many of the process flows described herein to achievethe user interfaces described herein may relate to embodiments thatconsider the functional structures, layers and limitations of currentmobile operating systems and are therefore constrained the limitationsof such mobile operating systems. For example, current mobile operatingsystem do not provide support for isolating personal and workenvironments as currently discussed herein. As such, user interfacesherein have been described within the context of using virtualizationtechniques to provide a work environment as a virtual machine running awork mobile device. However, it should be recognized that alternativeembodiments may not be limited to current mobile operating systemlimitations and may implement the user interfaces described herein bycreating an entirely new mobile operating system designed to separatepersonal and work environments. Accordingly, the described embodimentsare to be considered as illustrative and not restrictive, and the scopeof the claims is not to be limited to details given herein, but may bemodified within the scope and equivalents of the claims. In the claims,elements and/or steps do not imply any particular order of operation,unless explicitly stated in the claims.

The various embodiments described herein may employ variouscomputer-implemented operations involving data stored in computersystems. For example, these operations may require physical manipulationof physical quantities—usually, though not necessarily, these quantitiesmay take the form of electrical or magnetic signals, where they orrepresentations of them are capable of being stored, transferred,combined, compared, or otherwise manipulated. Further, suchmanipulations are often referred to in terms, such as producing,identifying, determining, or comparing. Any operations described hereinthat form part of one or more embodiments of the invention may be usefulmachine operations. In addition, one or more embodiments of theinvention also relate to a device or an apparatus for performing theseoperations. The apparatus may be specially constructed for specificrequired purposes, or it may be a general purpose computer selectivelyactivated or configured by a computer program stored in the computer. Inparticular, various general purpose machines may be used with computerprograms written in accordance with the teachings herein, or it may bemore convenient to construct a more specialized apparatus to perform therequired operations.

The various embodiments described herein may be practiced with othercomputer system configurations including hand-held devices,microprocessor systems, microprocessor-based or programmable consumerelectronics, minicomputers, mainframe computers, and the like.

One or more embodiments of the present invention may be implemented asone or more computer programs or as one or more computer program modulesembodied in one or more computer readable media. The term computerreadable medium refers to any data storage device that can store datawhich can thereafter be input to a computer system—computer readablemedia may be based on any existing or subsequently developed technologyfor embodying computer programs in a manner that enables them to be readby a computer. Examples of a computer readable medium include a harddrive, network attached storage (NAS), read-only memory, random-accessmemory (e.g., a flash memory device), a CD (Compact Discs)—CD-ROM, aCD-R, or a CD-RW, a DVD (Digital Versatile Disc), a magnetic tape, andother optical and non-optical data storage devices. The computerreadable medium can also be distributed over a network coupled computersystem so that the computer readable code is stored and executed in adistributed fashion.

Virtualization systems in accordance with the various embodiments, maybe implemented as hosted embodiments, non-hosted embodiments or asembodiments that tend to blur distinctions between the two, are allenvisioned. Furthermore, various virtualization operations may be whollyor partially implemented in hardware. For example, a hardwareimplementation may employ a look-up table for modification of storageaccess requests to secure non-disk data.

Many variations, modifications, additions, and improvements arepossible, regardless the degree of virtualization. The virtualizationsoftware can therefore include components of a host, console, or guestoperating system that performs virtualization functions. Pluralinstances may be provided for components, operations or structuresdescribed herein as a single instance. Finally, boundaries betweenvarious components, operations and data stores are somewhat arbitrary,and particular operations are illustrated in the context of specificillustrative configurations. Other allocations of functionality areenvisioned and may fall within the scope of the invention(s). Ingeneral, structures and functionality presented as separate componentsin exemplary configurations may be implemented as a combined structureor component. Similarly, structures and functionality presented as asingle component may be implemented as separate components. These andother variations, modifications, additions, and improvements may fallwithin the scope of the appended claims(s).

What is claimed:
 1. A method for displaying alerts provided byapplications of a guest environment in a notification bar controlled bya host operating system (OS) in a host environment of a mobile device,wherein the guest environment is running in a virtual machine supportedby a hypervisor running within the host environment, the methodcomprising: registering, by a hypervisor-aware service running on aguest OS of the virtual machine, with the guest OS to be notified by theguest OS when applications of the guest environment request the guest OSto present alerts in a notification bar controlled by the guest OS,wherein the hypervisor-aware service is aware that it is running in thevirtual machine on top of the hypervisor and can request or provide dataand services to and from the hypervisor; upon receipt by thehypervisor-aware service of a notification by the guest OS of anapplication requesting presentation of an alert in the notification barcontrolled by the guest OS, forwarding the notification to thehypervisor, wherein the alert is one of an e-mail alert, a calendaralert, and a telephone call alert; and transmitting, by the hypervisor,a corresponding request to a notification management component of thehost OS to present the alert on the notification bar controlled by thehost OS, the notification management component configured to present thealert on the notification bar controlled by the host OS concurrentlywith a notification from an application of the host OS and systeminformation generated by the host OS; wherein display of thenotification bar controlled by the host OS persists when a userinterface (UI) of the guest environment is displayed in place of a UI ofthe host environment and when the UI of the host environment isdisplayed in place of the UI of the guest environment, and wherein, upona swipe motion by a user on the notification bar controlled by the hostOS, the host OS displays an expanded notification bar that comprisesadditional detailed information that differentiates alerts ofapplications of the guest OS from alerts of applications of the host OS.2. The method of claim 1, wherein, when displaying the UI of the guestenvironment on the mobile device, the notification bar controlled by thehost OS is displayed rather than displaying the notification barcontrolled by the guest OS.
 3. The method of claim 1, wherein thecorresponding request transmitted by the hypervisor to the host OSincludes an identifier associating the alert with the application. 4.The method of claim 3, further comprising: receiving, at the hypervisor,the identifier from the host OS upon a selection by a user of the alerton the notification bar controlled by the host OS; transmitting, by thehypervisor, the identifier to the hypervisor-aware service; andrequesting, by the hypervisor-aware service, the guest OS to launch theapplication by providing the identifier to the guest OS.
 5. The methodof claim 1, wherein the notification bar controlled by the host OSdisplays a guest environment icon when the UI of the host environment isdisplayed on the mobile device, wherein a selection of the guestenvironment icon causes the mobile device to display the UI of the guestenvironment.
 6. The method of claim 1, wherein the notification barcontrolled by the host OS displays additional UI elements todifferentiate icons displayed in the notification bar relating toapplications of the guest OS from icons displayed in the notificationbar relating to applications of the host OS.
 7. A non-transitorycomputer-readable storage medium including instructions that, whenexecuted on a processor in a mobile device, causes the processor todisplay alerts provided by applications of a guest environment in anotification bar controlled by a host operating system (OS) in a hostenvironment of the mobile device, wherein the guest environment isrunning in a virtual machine supported by a hypervisor running withinthe host environment, by performing the steps of: registering, by ahypervisor-aware service running on a guest OS of the virtual machine,with the guest OS to be notified by the guest OS when applications ofthe guest environment request the guest OS to present alerts in anotification bar controlled by the guest OS, wherein thehypervisor-aware service is aware that it is running in the virtualmachine on top of the hypervisor and can request or provide data andservices to and from the hypervisor; upon receipt by thehypervisor-aware service of a notification by the guest OS of anapplication requesting presentation of an alert in the notification barcontrolled by the guest OS, forwarding the notification to thehypervisor, wherein the alert is one of an e-mail alert, a calendaralert, and a telephone call alert; and transmitting, by the hypervisor,a corresponding request to a notification management component of thehost OS to present the alert on the notification bar controlled by thehost, the notification management component configured to present thealert on the notification bar controlled by the host OS concurrentlywith a notification from an application of the host OS and systeminformation generated by the host OS; wherein display of thenotification bar controlled by the host OS persists when a userinterface (UI) of the guest environment is displayed in place of a UI ofthe host environment and when the UI of the host environment isdisplayed in place of the UI of the guest environment, and wherein, upona swipe motion by a user on the notification bar controlled by the hostOS, the host OS displays an expanded notification bar that comprisesadditional detailed information that differentiates alerts ofapplications of the guest OS from alerts of applications of the host OS.8. The non-transitory computer-readable storage medium of claim 7,wherein, when displaying the UI of the guest environment on the mobiledevice, the notification bar controlled by the host OS is displayedrather than displaying the notification bar controlled by the guest OS.9. The non-transitory computer-readable storage medium of claim 7,wherein the corresponding request transmitted by the hypervisor to thehost OS includes an identifier associating the alert with theapplication.
 10. The non-transitory computer-readable storage medium ofclaim 9, wherein the instructions further cause the processor to performthe steps of: receiving, at the hypervisor, the identifier from the hostOS upon a selection by a user of the alert on the notification barcontrolled by the host OS; transmitting, by the hypervisor, theidentifier to the hypervisor-aware service; and requesting, by thehypervisor-aware service, the guest OS to launch the application byproviding the identifier to the guest OS.
 11. The non-transitorycomputer-readable storage medium of claim 7, wherein the notificationbar controlled by the host OS displays a guest environment icon when theUI of the host environment is displayed on the mobile device, wherein aselection of the guest environment icon causes the mobile device todisplay the UI of the guest environment.
 12. The non-transitorycomputer-readable storage medium of claim 7, wherein the notificationbar controlled by the host OS displays additional UI elements todifferentiate icons displayed in the notification bar relating toapplications of the guest OS from icons displayed in the notificationbar relating to applications of the host OS.
 13. A mobile device,comprising: a host operating system (OS) providing a host environment; ahypervisor running within the host environment supporting a virtualmachine, the virtual machine having a guest OS providing a guestenvironment; and a processor configured to execute the host OS and thehypervisor and configured to: register a hypervisor-aware servicerunning on the guest OS of the virtual machine with the guest OS to benotified by the guest OS when applications of the guest environmentrequest the guest OS to present alerts in a notification bar controlledby the guest OS, wherein the hypervisor-aware service is aware that itis running in the virtual machine on top of the hypervisor and canrequest or provide data and services to and from the hypervisor; forwardthe notification to the hypervisor upon receipt by the hypervisor-awareservice of a notification by the guest OS of an application requestingpresentation of an alert in the notification bar controlled by the guestOS, wherein the alert is one of an email alert, a calendar alert, and atelephone call alert; and transmit, through the hypervisor, acorresponding request to a notification management component of the hostOS to present the alert on a notification bar controlled by the host OS,the notification management component configured to present the alert onthe notification bar controlled by the host OS concurrently with anotification from an application of the host OS and system informationgenerated by the host OS; wherein display of the notification barcontrolled by the host OS persists when a user interface (UI) of theguest environment is displayed in place of a UI of the host environmentand when the UI of the host environment is displayed in place of the UIof the guest environment, and wherein, upon a swipe motion by a user onthe notification bar controlled by the host OS, the host OS displays anexpanded notification bar that comprises additional detailed informationthat differentiates alerts of applications of the guest OS from alertsof applications of the host OS.
 14. The mobile device of claim 13,wherein, when displaying the UI of the guest environment on the mobiledevice, the notification bar controlled by the host OS is displayedrather than displaying the notification bar controlled by the guest OS.15. The mobile device of claim 13, wherein the corresponding requesttransmitted by the hypervisor to the host OS includes an identifierassociating the alert with the application.
 16. The mobile device ofclaim 15, wherein the processor is further configured to: receive,through the hypervisor, the identifier from the host OS upon a selectionby a user of the alert on the notification bar controlled by the hostOS; transmit, through the hypervisor, the identifier to thehypervisor-aware service; and request, through the hypervisor-awareservice, the guest OS to launch the application by providing theidentifier to the guest OS.
 17. The mobile device of claim 13, whereinthe notification bar controlled by the host OS displays a guestenvironment icon when the UI of the host environment is displayed on themobile device, wherein a selection of the guest environment icon causesthe mobile device to display the UI of the guest environment.
 18. Themobile device of claim 13, wherein the notification bar controlled bythe host OS displays additional UI elements to differentiate iconsdisplayed in the notification bar relating to applications of the guestOS from icons displayed in the notification bar relating to applicationsof the host OS.